访问未声明的静态属性php致命错误

class MyClass {
    public static $myStaticProperty = "Hello, World!";
}

echo MyClass::$myStaticProperty; // 输出 "Hello, World!"

if (property_exists('MyClass', 'myStaticProperty')) {
    echo MyClass::$myStaticProperty;
} else {
    echo "Property does not exist.";
}